Comment by stubish

The bit about FEX is interesting. Taking x86 code and running it on ARM. The most important thing for Valve to do is pick what instruction set to use, one you can run natively or native hardware, or efficiently and reliably through translation on alien hardware. ARM might be a great choice, as hardware exists at scale on mobile devices, and emulated on other devices even if the CPU happens to be Intel or AMD. Valve is then in control, rather than Intel or Apple or Microsoft.